Twice-Baked Mashed Potatoes are an indulgent comfort dish of creamy roasted-garlic mashed potatoes finished with melted gruyère, crisp prosciutto, and fresh chives. This version elevates the classic casserole with bright savory notes and satisfying contrast in texture. Serve as a show-stopping side for holiday meals or an upgraded weeknight dinner.
These Twice-Baked Mashed Potatoes are a favorite for Thanksgiving, Christmas, and family dinners. They pair beautifully with roast meats, poultry, or hearty vegetarian mains and also complement simple roasted vegetables.
About Twice-Baked Mashed Potatoes
- Taste – Buttery, cheesy, and savory from roasted garlic, Parmigiano-Reggiano, and melted gruyère, finished with salty crisp prosciutto.
- Texture – Silky, creamy mashed potatoes contrasted by crunchy prosciutto and a browned cheese topping.
- Effort – Straightforward: roast garlic and prosciutto, boil and mash potatoes, fold in dairy and seasonings, then bake.
- Time – About 15 minutes active prep plus roughly an hour to roast garlic and prosciutto, boil and mash potatoes, and bake the casserole.
Ingredients
- Garlic bulbs – Roasted until soft and sweet for a mellow garlic flavor.
- Olive oil – To coat the garlic before roasting.
- Prosciutto – Baked until crisp and broken into small pieces to sprinkle over the finished dish.
- Yukon Gold potatoes – Creamy and buttery, ideal for mashing.
- Butter – Adds richness and smoothness to the mashed potatoes.
- Parmigiano-Reggiano – Grated for a savory, nutty depth.
- Heavy cream – Warmed with butter and folded into the potatoes for silkiness.
- Sour cream or crème fraîche – Adds tang and moisture.
- Freshly ground black pepper – For seasoning.
- Gruyère or white cheddar – Shredded and melted on top for a golden, cheesy crust.
- Chives – Chopped and sprinkled on top for a mild onion note and color.
See the recipe card below for quantities and full details.
Substitutions and Variations
- Red potatoes – Waxy and firm; mix with Yukon for texture variations.
- Russet potatoes – Produce a lighter, fluffier mash.
- Stock – Boil potatoes in chicken or vegetable stock for extra flavor.
- Bacon or pancetta – Swap for prosciutto if you prefer a different cured-meat character.
- Herbs – Add sage, rosemary, or thyme for an herb-forward version.
- Green onions – Use in place of chives for a stronger onion flavor.
- Truffle – Finish with truffle oil or shaved truffle for a luxurious twist.
Instructions
Roasted Garlic and Prosciutto
- Prepare oven – Preheat to 400°F. Trim the papery outer layers from whole garlic bulbs and slice about 1/4 inch off the top so the cloves are exposed. Place each bulb cut-side up on a square of foil, drizzle with olive oil, and wrap tightly.
- Roast garlic – Roast wrapped garlic on a baking sheet in the middle of the oven for 40–45 minutes, until cloves are tender and caramelized.
- Crisp the prosciutto – With about 10 minutes left on the garlic, arrange prosciutto slices in a single layer on a parchment-lined baking sheet and bake 8–10 minutes until crisp. Transfer to a wire rack to cool, then chop into small pieces. Reduce oven temperature to 350°F before baking the potatoes.
- Remove roasted garlic – When cool enough to handle, squeeze or pull the soft roasted cloves from each bulb and set aside.
Mashed Potatoes
- Boil potatoes – Place peeled (or unpeeled, if you prefer texture) and cut potatoes in a large pot. Cover with cold water, bring to a boil, and cook 15–20 minutes until fork-tender. Drain well.
- Warm cream and butter – While potatoes cook, warm butter and heavy cream in a small saucepan over medium heat until hot, then remove from heat.
- Mash – Immediately mash drained potatoes using a ricer or potato masher into a large bowl for the smoothest texture.
- Fold in – Add the warm butter-and-cream mixture, roasted garlic, grated Parmigiano-Reggiano, sour cream or crème fraîche, kosher salt, freshly cracked pepper, and chopped chives. If the mash seems dry, stir in additional heavy cream a quarter-cup at a time until you reach the desired creaminess.
- Transfer and top – Spread the mashed potatoes in a greased 9×13-inch baking dish. Smooth the surface and top with shredded gruyère (or cheddar or a blend).
- Bake – Bake uncovered at 350°F for 30–35 minutes, until heated through and the cheese is melted and lightly browned.
- Garnish and serve – Remove from the oven, scatter the crispy prosciutto and extra chives over the top, and serve warm.
Pro tip – For more rustic texture, leave the skins on the potatoes and proceed with the same steps; the finished dish will have a heartier bite.
What to Serve with Twice Baked Mashed Potatoes
These potatoes work well with roasted turkey, roast chicken, baked ham, steak, or vegetable mains. They also pair nicely with simply sautéed greens or roasted squash for a balanced plate.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days, or freeze for up to 1 month. Reheat in a baking dish at 350°F until warmed through, covering with foil if needed to prevent excessive browning.
Top Tips
- Avoid overworking – Do not overmix the potatoes, sour cream, or cheese to prevent a gluey texture. Use a ricer or gentle mashing for the best results.
- Make ahead – Prepare the mashed potatoes up to 2 days in advance, then transfer to the baking dish, top with cheese, and bake just before serving. Add prosciutto and chives after baking for maximum crispness and color.
- Adjust creaminess – Add warm cream incrementally to reach your preferred consistency.
Recipe FAQs
Use a potato ricer or gently mash the potatoes and fold in warm butter and cream along with sour cream or crème fraîche. Avoid overmixing to keep the potatoes light and silky.
Mashed potatoes are simply boiled and mashed with dairy and seasonings. Twice-baked mashed potatoes are mashed and then baked as a casserole, often with an added cheese topping and garnish.
Yes. Make the roasted-garlic mashed potatoes 1–2 days ahead, refrigerate, then transfer to a baking dish, top with cheese and bake when ready to serve. Add crispy prosciutto and fresh chives just before serving.
Use Yukon Gold or a similar waxy potato that retains moisture, and include enough butter, sour cream, and heavy cream. If the dish looks dry before serving, stir in a bit more warm cream.
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Roasted Garlic Mashed Potatoes (Fluffy & Creamy)
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Bacon Cheddar Hasselback Potatoes
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📖 Recipe
Twice-Baked Mashed Potatoes
Equipment
- Potato peeler (optional)
- Measuring cups
- Baking sheet
- Medium pot
- Potato ricer or masher
- Baking dish (9×13-inch)
Ingredients
- 2 garlic bulbs
- 2 tbsp olive oil
- 3 prosciutto slices
- 3 lb Yukon Gold potatoes, cut into halves or quarters, skin on or peeled
- 6 tbsp butter, cubed
- 1/2 cup Parmigiano-Reggiano, grated
- 3/4 cup heavy cream, plus more as needed
- 3/4 cup sour cream or crème fraîche
- Kosher or sea salt, to taste
- Freshly cracked black pepper, to taste
- 1 cup gruyère, grated (or white cheddar or a blend)
- 2 tbsp chives, chopped, plus more for garnish
Instructions
Roasted Garlic and Prosciutto
- Preheat oven to 400°F. Trim the garlic bulbs and slice the tops so the cloves are exposed. Drizzle with olive oil, wrap in foil, and roast 40–45 minutes until soft.
- With about 10 minutes remaining on the garlic, place prosciutto slices on a parchment-lined baking sheet and bake 8–10 minutes until crisp. Cool on a rack and chop.
- When garlic is cool, squeeze the roasted cloves from the bulbs and set aside. Reduce oven temperature to 350°F.
Mashed Potatoes
- While the garlic roasts, add potatoes to a large pot, cover with cold water, and bring to a boil. Cook 15–20 minutes until fork-tender. Drain well.
- Warm butter and heavy cream in a saucepan over medium heat until hot, then remove from heat.
- Rice or mash the potatoes into a large bowl. Fold in the warm butter-and-cream mixture, roasted garlic, Parmigiano-Reggiano, sour cream, salt, pepper, and chives. Add more cream if needed for desired consistency.
- Transfer the mashed potatoes to a greased 9×13-inch baking dish. Smooth the top and sprinkle with grated gruyère.
- Bake at 350°F for 30–35 minutes until heated through and the cheese is melted. Remove from oven and top with crispy prosciutto and additional chives. Serve immediately.
Notes
Storage: Refrigerate leftovers in an airtight container for up to 3 days, or freeze for up to 1 month. Reheat in a covered baking dish at 350°F until warmed through.
Tips: Do not overwork the potatoes to avoid a gummy texture. A potato ricer makes silky potatoes. Prepare the mashed potatoes a day or two ahead and bake with cheese before serving for easier holiday timing.